Taddeo and Pier were ambassadors to Pope Gregory IX and, after 1244, to Innocent IV. In 1245 Taddeo unsuccessfully defended the cause of the excommunicated emperor at the Council of Lyon against the accusations made against him by Innocent.[1]

He died at the Battle of Parma, killed during the Guelph assault against the imperial camp. Taddeo was captured, had his hands cut off, and was thrown into prison to die shortly later.[2]